CN116480633A - Installation method of centrifugal ammonia synthesis gas compressor - Google Patents
Installation method of centrifugal ammonia synthesis gas compressor Download PDFInfo
- Publication number
- CN116480633A CN116480633A CN202310594793.3A CN202310594793A CN116480633A CN 116480633 A CN116480633 A CN 116480633A CN 202310594793 A CN202310594793 A CN 202310594793A CN 116480633 A CN116480633 A CN 116480633A
- Authority
- CN
- China
- Prior art keywords
- bearing
- unit
- installing
- rotor
- firstly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000009434 installation Methods 0.000 title claims abstract description 28
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 21
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 21
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 21
- 238000005192 partition Methods 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 238000012360 testing method Methods 0.000 claims abstract description 8
- 239000003921 oil Substances 0.000 claims description 29
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 16
- 239000010687 lubricating oil Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 238000009415 formwork Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 210000004907 gland Anatomy 0.000 claims description 7
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 claims description 3
- 239000003085 diluting agent Substances 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 239000011121 hardwood Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- 235000013372 meat Nutrition 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004381 surface treatment Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 claims description 3
- 229940099259 vaseline Drugs 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 9
- 239000004519 grease Substances 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000001996 bearing alloy Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000013102 re-test Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
- F04D25/045—Units comprising pumps and their driving means the pump being fluid-driven the pump wheel carrying the fluid driving means, e.g. turbine blades
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a method for installing a centrifugal ammonia synthesis gas compressor, which comprises the steps of basic adjustment, equipment base installation and leveling, equipment base grouting, turbine installation, high/low pressure cylinder installation, initial centering of a unit, disassembly of the high/low pressure cylinder, disassembly of a support bearing, checking of a clearance of the support bearing, disassembly of an assembled bearing, axial displacement of a thrust bearing, assembly of the thrust bearing, disassembly of a rotor, labyrinth seal and a partition plate, descaling and inspection of the rotor and the partition plate, return installation of a cylinder body and parts, oil circulation, precise centering of the unit and single-machine test run. According to the invention, through reasonably arranging the mounting process steps, the mounting efficiency of the high-pressure centrifugal compressor driven by the steam turbine is improved.
Description
Technical Field
The invention relates to the field of installation of centrifugal compressors in petrochemical industry, in particular to an installation method of a centrifugal ammonia synthesis gas compressor.
Background
The application requirements of the modern petrochemical industry on the centrifugal compressors are continuously increasing, and the installation of the centrifugal compressors has become a great important component part of installation units in the installation and construction process of equipment. However, in reality, the compressor is often transported by being divided into several parts due to its large volume, considering the transportation and other problems, and assembled on site after reaching the installation site.
Because of the complexity of the compressor installation program, the installation of the core compressor can be completed rapidly and efficiently only by continuously improving the installation method of the centrifugal compressor, and meanwhile, the construction cost can be reduced, the construction period is shortened, and great benefits are brought.
In order to solve the above problems, a method for installing a centrifugal ammonia synthesis gas compressor is proposed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for installing a centrifugal ammonia synthesis gas compressor, so as to achieve the purposes of effectively improving the installation accuracy and accelerating the installation efficiency in the installation process of the centrifugal ammonia synthesis gas compressor.
In order to solve the technical problems, the invention adopts the following technical scheme:
a method of installing a centrifugal ammonia synthesis gas compressor comprising:
step one, basic adjustment;
step two, mounting and leveling the equipment base;
after finishing the surface treatment of the unit foundation, hoisting the equipment base into position by using an automobile crane, and leveling the base by adopting a suspension sizing block installation method;
step three, grouting the equipment base;
grouting the foundation bolt holes with a high-strength shrinkage-free grouting material to a height of 100mm, filling with dry sand, supporting the formwork around the foundation bolt footing plates, pouring an epoxy resin grouting material into the formwork along one side of the formwork, and removing the formwork after reaching the strength to finish primary grouting; after primary grouting, grouting for the second time by using epoxy resin grouting material;
step four, installing a steam turbine;
the turbine cylinder body and the bearing seat are arranged on a common base, and the levelness of the unit is adjusted by adjusting jackscrews of the base;
step five, installing a high/low pressure cylinder;
after the turbine is leveled, the turbine is taken as a reference machine, and a high-pressure cylinder, a low-pressure cylinder and a gearbox are sequentially hoisted;
step six, primary centering of the unit;
the alignment among all components of the centrifugal compressor unit adopts a three-table alignment method, a steam turbine is used as a reference machine during alignment, a high-pressure cylinder is aligned with the steam turbine, then the low-pressure cylinder is aligned with the steam turbine, and finally the gear box is aligned with a driving machine; firstly, performing axial alignment calibration on a vertical plane, adjusting by changing the thickness of a gasket below a supporting leg of a compressor, and after the axial alignment is finished, performing preliminary alignment on a machine by adopting an instrument with three dial indicators, wherein one dial indicator at a radial position measures the radial deviation of a shaft, and the two dial indicators at axial positions measure the axial deviation of the shaft;
step seven, disassembling the high/low pressure cylinder;
after the primary centering acceptance of the unit is finished, the high-pressure cylinder and the low-pressure cylinder of the ammonia synthesis gas compressor unit are disassembled, cleaned and data retested;
step eight, disassembling the support bearing;
firstly, detaching an instrument and a wire which are arranged on a bearing box cover or a bearing cover, then detaching a pin and a screw which are connected with two halves of a coupler shield, and detaching the upper half; then the bearing box cover is taken down, screws for fixing the bearing cover are unscrewed, the bearing cover is taken out vertically, and finally screws for connecting the two half bearings are unscrewed;
step nine, checking the clearance of the support bearing;
checking the clearance of the support bearing, firstly carefully cleaning the bearing and the journal, installing an upper half bearing and a lower half bearing, putting a lead wire at the top of the journal, then installing the upper half bearing, then installing a bearing cover, screwing the bearing cover during final assembly, then removing the bearing cover and the upper half bearing, finally taking down the lead wire, measuring at two or three flattened positions of the lead wire by using a micrometer, and reading the average value; if the average value of the measurement is greater than the "diameter clearance" required by the device, the bearing needs to be replaced.
Step ten, assembling a bearing;
the assembly sequence is opposite to the disassembly sequence of the step seven and the step eight;
step eleven, disassembling the thrust bearing;
firstly, detaching a bearing box cover or an instrument and a cable on a bearing cover, secondly, detaching the upper half of a coupler shield, then detaching a thrust bearing and a gland for supporting the bearing, lifting the bearing gland, gradually removing thrust pads in the lifting process, then removing a lower half thrust ring, rotating the lower half thrust ring to a detachable position, and finally removing an adjusting gasket of the thrust bearing;
step twelve, checking the axial displacement of the rotor;
when the thrust bearing is disassembled, firstly checking axial displacement in two directions to determine whether the axial displacement keeps the designed value of the unit, secondly fixing the dial indicator on the shell, enabling the dial indicator contact to contact the end part of the rotor, and then axially moving the rotor in two directions until the inner part of the rotor contacts the shell part; finally, comparing whether the value read on the dial indicator is equal to two added clearance values in the compressor assembly drawing;
assembling a thrust bearing;
firstly, dividing an adjusting gasket of a thrust bearing into two halves, enabling the joint surfaces of the two halves to be in a horizontal position during installation, keeping the joint surfaces of the upper half and the lower half of a thrust ring in a vertical position, and then drilling holes on certain tiles of the thrust bearing so as to install thermocouples or leveling plates for installing an electric power sensing element and detecting the axial thrust of a rotor; finally, placing the bearing cover on the bracket, and if the bearing cover cannot be immediately meshed, manually rotating the shaft to apply force in two directions, and placing the bearing cover along the rotor shaft until the bearing cover is completely fastened on the bracket;
fourteen, disassembling the rotor, the labyrinth seal and the partition plate;
firstly, disassembling two top half parts of a thrust bearing and a supporting bearing, secondly, screwing four guide rods on a lower half shell, avoiding damaging a labyrinth seal when the upper half shell is lifted, then, disassembling a fixing bolt and a locating pin on a split surface of the shell, lifting the upper half shell by using a lifting screw, then, lifting the upper half shell to be placed on four hard wood brackets, fixing the upper half of a partition plate and the labyrinth seal on the upper half shell by using bolts, lifting the partition plate and the labyrinth seal together with the upper half shell, and finally tying two steel wire ropes coated with new meat materials such as rubber or plastic on two shafts between a shaft neck and the seal, lifting a rotor from the lower half shell and keeping the rotor horizontal;
fifteen, descaling and checking the rotor and the partition plate;
sixthly, the cylinder body and parts are assembled back;
seventeenth step, oil circulation;
eighteen steps, unit fine centering;
after the unit oil circulation is finished and the acceptance is qualified, the unit pipeline is required to be reinstalled, and after the reinstallation is finished, the unit is finally centered, and a three-table alignment method is adopted in the centering method;
nineteenth, single machine test run;
and after the oil system is in trial operation, the unit can be in trial operation, the compressor unit is subjected to empty load trial operation, and the load trial operation is performed after the empty load trial operation is in error.
Further, in the first step, when the foundation is adjusted, firstly checking whether the size, the position and the verticality of the foundation bolt hole reach the standard; and then removing the floating slurry layer at the position 20-25mm of the surface of the foundation upper layer, and finally accurately placing a jackscrew backing plate for adjusting the height of the base.
In the second step, firstly, a jackscrew base plate is placed on a foundation, jackscrews are jacked on the jackscrew base plate, a base is placed on the foundation slowly, and the jackscrews are used for leveling, so that the distance between the base and the foundation reaches the designed given size; the base is carefully leveled in the longitudinal direction and the transverse direction by using jackscrews, and the adjusting bolts are uniformly adjusted to uniformly bear respective loads.
Further, in the fourth step, the transverse levelness of the bearing seats at the two ends is guaranteed to be within 0.3mm/m, the axial levelness of the base at the exhaust side or the cylinder body is guaranteed to be within 0.3mm/m, and all foundation bolts are fastened after the adjustment of the level and the centrality of the base is finished.
In the step six, firstly, the radial dial indicator on the surface corresponding to the vertical direction is adjusted to 0 position according to the reading of the radial deviation during alignment, the two shafts are rotated according to the rotation direction of the shafts, the reading of the dial indicator is recorded every 90 degrees, if the dial indicator contact is pressed into the proper position, the reading is determined as positive, otherwise, the reading is determined as negative; the axial deflection of the shaft was measured using two dial gauges 180 ° apart, and initially set back to zero. And reading the axial deviation, namely setting the dial indicator to a zero point by adopting two dial indicators which are vertically arranged.
Further, in step nine, the lead wire is placed axially, the lead wire length should be longer than the bearing, and the lead wire is stuck with vaseline oil.
In the step fifteen, the dirt of the rotor and the partition plate is treated by the diluent, the petroleum extract and the trichloroethylene, then the dirt is removed by using metal brushes with different sizes which can contact with internal parts such as the impeller channel and the diffuser, the dirt is brushed for protection, and then the labyrinth sealing sheet is tapped to check whether the labyrinth sealing sheet is damaged or not, and the sealing gap of the sealing sheet and the rust condition in the impeller channel are carefully checked.
In the seventeenth step, after all mechanisms are reinstalled and inspected, the whole oil system of the unit needs to be washed, and a stand-alone test operation is performed on the spare lubricating oil pump; secondly, the lubricating oil does not pass through a unit bearing, only the lubricating oil circulation pipeline is washed, and the high-level oil tank is cleaned manually; then, connecting the lubricating oil pipeline with the lubricating oil injection points of all bearings of the unit, and flushing all bearings of the unit and flushing a high-level oil groove; finally, the control oil system line is flushed.
The invention provides a method for installing a centrifugal ammonia synthesis gas compressor, which improves the installation efficiency of a high-pressure centrifugal compressor driven by a steam turbine by reasonably arranging the installation process steps, effectively solves the problems of long service cycle and low efficiency of a construction machine in the installation process of a compressor unit under similar construction conditions, has the advantages of simple and convenient construction procedure, high construction speed, high working efficiency and the like, and further saves the construction cost due to the installation efficiency of a core compressor to a great extent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention.
FIG. 1 is a construction process of the present invention;
FIG. 2 is a schematic illustration of the installation of a modular jackscrew pad of the present invention;
FIG. 3 is a turbine leveling chart of the present invention;
FIG. 4 is a schematic diagram of alignment of the unit of the present invention;
fig. 5 is a schematic view of the cylinder head lifting of the present invention.
In the figure, 1-backing plate, 2-equipment base, 3-foundation, 4-jackscrew, 5-grouting layer, 6-level,
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the installation method of the centrifugal ammonia synthesis gas compressor provided by the invention comprises the steps of foundation adjustment, equipment base installation and leveling, equipment base grouting, turbine installation, high/low pressure cylinder installation, unit primary centering, high/low pressure cylinder disassembly, support bearing clearance checking, bearing assembling, thrust bearing disassembly, rotor axial displacement checking, thrust bearing assembling, rotor, labyrinth seal and baffle disassembly, descaling and inspection of the rotor and the baffle, cylinder body and part refitting, oil circulation, unit precise centering and single machine test run.
Basic adjustment
Firstly, checking whether the size, the position and the verticality of the foundation bolt hole reach the standard. Then the 20-25mm part of the surface of the foundation upper layer is removed by polishing to form a floating slurry layer, and finally, a jackscrew backing plate for adjusting the height of the base is accurately placed.
As shown in fig. 2, the surface distance of the wire shim plate 1 from the base 3 is a minimum distance of 20mm, and the height of the surface of the wire shim plate 1 can be adjusted within a range of + -5 mm, but the accuracy of the surface level in any direction must be kept within about 1 mm/m, so that the device base 2 is uniformly supported by each wire shim plate 1.
Equipment base mounting leveling
After finishing the surface treatment of the unit foundation 3, hoisting the equipment base 2 into position by using an automobile crane, then pushing the jackscrews 4 onto the jackscrew backing plate 1, slowly placing the equipment base 2 on the foundation 3, and leveling by using the jackscrews 4 to ensure that the distance between the equipment base 2 and the foundation 3 reaches the designed given size. The device base 2 is then carefully leveled in both the longitudinal and transverse directions with the jackscrews 4, and the adjusting bolts are uniformly adjusted to uniformly bear the respective loads.
And (3) supporting the mould around the suspension sizing block after leveling the equipment base 2, performing primary grouting, removing the primary grouting mould after the primary grouting is completed, and performing secondary grouting on the whole base.
Grouting equipment base
Firstly, because the anchor screw holes of the machine set are anchor bolt holes of phi 89 embedded pipes, the anchor bolt holes are filled with high-strength shrinkage-free grouting materials to be 100mm in height, then dry sand is filled, then the periphery of the anchor bolt footing plate is subjected to formwork supporting, epoxy resin grouting materials are slowly poured into the formwork along one side of the formwork, and the formwork is removed after the strength is reached, so that primary grouting is completed. And after primary grouting, grouting for the second time by using epoxy resin grouting material.
Before grouting with epoxy grouting material, the grouting equipment, base and foundation surfaces are clean, dry and grease-free, the grouting surfaces of the equipment and the base must be coated with an epoxy primer, a grouting space of 25mm to 50mm is reserved, and finally, all the moulds and baffles must be coated with two layers of wax in advance to facilitate demoulding.
Turbine installation
The turbine cylinder body and the bearing seat are arranged on a common base, the horizontal levelness of the unit is adjusted through a jackscrew of the base, the transverse levelness of the bearing seats at the two ends must be ensured to be within 0.3mm/m on the speed adjusting side and the exhaust side, the axial levelness of the base or the cylinder body at the exhaust side is ensured to be within 0.3mm/m, when the adjustment of the horizontal and the central level of the base is finished, all foundation bolts are fastened, the fastening of the bolts cannot be too tight, otherwise, the adjusted horizontal and central levels can be damaged.
Referring to fig. 3, the field leveling position is required to be placed on the machining surface of the equipment shown in fig. 3, otherwise, accuracy of the measurement result is affected.
High/low pressure cylinder mounting
After the turbine is leveled, the turbine is used as a reference machine, and the high-pressure cylinder, the low-pressure cylinder and the gearbox are sequentially hoisted.
Initial centering of unit
The alignment among the components of the centrifugal compressor unit adopts a three-table alignment method, a steam turbine is used as a reference machine during alignment, the alignment between a high-pressure cylinder and the steam turbine is performed first, the alignment between a low-pressure cylinder and the steam turbine is performed, and finally the alignment between a gear box and a driving machine is performed.
Firstly, axial alignment calibration on a vertical plane is carried out, the thickness of a gasket below a supporting leg of a compressor is changed to adjust, after the axial alignment is finished, an instrument with three dial indicators is adopted to carry out preliminary alignment on a machine, one dial indicator at a radial position measures the radial deviation of a shaft, and the two dial indicators at the axial position measure the axial deviation of the shaft.
As shown in fig. 4, the radial deviation reading in alignment firstly adjusts the radial dial indicator on the surface corresponding to the vertical direction to 0 position, rotates the two shafts according to the shaft rotation direction, records the reading of the indicator every 90 degrees, if the dial indicator contact is pressed into the proper position, the reading is determined as positive number, otherwise, the reading is determined as negative number. The axial deflection of the shaft was measured using two dial gauges 180 ° apart, and initially set back to zero. And reading the axial deviation, namely setting the dial indicator to a zero point by adopting two dial indicators which are vertically arranged.
High/low pressure cylinder disassembly
And after the primary centering acceptance of the unit is finished, the high-pressure cylinder and the low-pressure cylinder of the ammonia synthesis gas compressor unit are disassembled, cleaned and subjected to data retest.
In order to accelerate the disassembly and assembly speed, ensure the assembly accuracy of the unit, avoid the inclination of the cylinder cover and the internal components during the disassembly and assembly, generate torsional shear stress, and in the field actual assembly process, a special hoisting tool is needed to be used for hoisting the cylinder cover and the internal components in cooperation with a chain block. Taking lifting of a unit cylinder cover as an example, firstly installing a chain block at lifting lugs at two ends of a shoulder pole tool, then hooking at the lifting lugs at the center of the shoulder pole lifting tool, observing whether the cylinder cover is horizontal or not in the lifting process, and if the cylinder cover is inclined, re-leveling the cylinder cover by adjusting the chain block, wherein the lifting of other components is the same as that of the cylinder cover.
Detachable support bearing
Firstly, detaching an instrument and a wire which are arranged on a bearing box cover or a bearing cover, secondly, detaching a pin and a screw which are connected with two halves of a coupler shield, detaching the upper half, then, detaching a bearing box cover, screwing off the screw which is used for fixing the bearing cover, vertically taking out the cover, and finally screwing off the screw which is connected with two halves of a bearing, thereby realizing the detachment of the support bearing.
The screw holes are formed in the upper portion of the bearing, so that the lifting ring screw is screwed up, the upper half bearing of the scooter is used for lifting, if the two halves of the bearing are difficult to separate, a wood hammer is needed to strike the joint surfaces of the two halves in turn in the horizontal direction; because the grease is arranged on the joint surface of the two halves, in order to avoid the bearing alloy from being damaged by sliding down or the journal from being damaged when the upper half of the bearing is lifted, the grease needs to be cleaned by clean cotton cloth.
Checking support bearing clearance
The method comprises the steps of firstly carefully cleaning the bearing and the journal, secondly installing an upper half bearing and a lower half bearing, putting a lead wire at the top of the journal, carefully installing the upper half bearing without slipping the lead wire, secondly installing a bearing cover, screwing the bearing cover during final assembly, secondly removing the bearing cover and the upper half bearing, finally taking the lead wire off and measuring two or three flattened positions of the lead wire by using a micrometer, and reading the average value. If the average value of the measurement is greater than the "diameter clearance" required by the device, the bearing needs to be replaced.
Regarding the placement of the lead wire, it should be placed axially, longer than the bearing, and stuck with vaseline oil. The lead wire should be chosen according to the measurement gap and standard specifications, for example, a lead wire twice or three times the bearing gap value may be used.
Assembled bearing
The assembly sequence is reversed from the disassembly sequence of the support bearings described above. During assembly, the parts are carefully painted, the parts are mounted in place, and the bearing caps cannot be mounted if the lower half bearing is not mounted in the correct position.
Thrust bearing removal
Before disassembly, the compressor equipment and related instructions of the instrument are needed, firstly, the bearing box cover or the instrument and the cable on the bearing cover are disassembled, secondly, the upper half of the coupler shield is disassembled, then the thrust bearing and the gland for supporting the bearing are disassembled, the bearing gland is slowly lifted, the bearing gland is lifted up as far as possible, the thrust pads are lifted up as possible, the thrust pads are removed block by block in the lifting process, then the lower half thrust ring is removed, the lower half thrust ring is rotated to reach the detachable position, and finally, the adjusting gasket of the thrust bearing is removed. After all the thrust block is taken down, the thrust block can be cleaned by oil, grease is carefully wiped off after cleaning, the alloy surface is inspected, and scratches caused by oil dirt are removed.
Checking axial displacement of rotor
When the thrust bearing is disassembled, firstly, the axial displacement in two directions is checked to determine whether the axial displacement keeps the designed value of the unit, secondly, the dial indicator is fixed on the shell, the dial indicator contacts contact the end part of the rotor, and then the rotor is axially moved in two directions until the inner part of the rotor contacts the shell part. Finally, it is compared whether the value read on the dial indicator is equal to the two added gap values given in the compressor package.
Thrust bearing assembly
The thrust bearing has its adjusting pad divided into two parts, the joint surface of the two parts is horizontal and the joint surface of the upper and lower parts of the thrust ring is vertical, and some blocks of the thrust bearing need to be drilled for installing thermocouple or leveling plate for installing power sensor for detecting the axial thrust of the rotor. Finally, the bearing cap is placed lightly on the bracket, and if the bearing cap cannot be immediately snapped on, the shaft is turned by hand in both directions, and the bearing cap is placed along the rotor shaft until it is completely fastened on the bracket.
Rotor, labyrinth seal and separator removal
The thrust bearing and the two top halves of the supporting bearing are disassembled firstly, four guide rods are screwed on the lower half shell, so that the damage to the labyrinth seal is avoided when the upper half shell is lifted, the fixing bolts and the locating pins on the middle split surfaces of the shell are removed, the upper half shell is lifted up by a few millimeters by using the lifting bolts, then the upper half shell is lifted up and put on four hardwood brackets, the upper half of the partition plate and the labyrinth seal are fixed on the upper half shell by using the bolts and lifted up together with the upper half shell, finally, two steel wires coated with rubber or plastic and other meat materials are tied on two shafts between the shaft neck and the seal, the rotor is lifted up from the lower half shell, and the labyrinth seal is kept horizontal, and the labyrinth seal is not damaged carefully placed.
Descaling and inspection of rotors and diaphragms
For dirt of the rotor and the partition plate, firstly, diluent, petroleum extract, trichloroethylene and the like are used for treatment, then, metal brushes with different sizes which can contact with internal parts such as impeller channels, diffusers and the like are used for removing dirt, oil is brushed for protection, and then, a labyrinth sealing sheet is tapped for checking whether the labyrinth sealing sheet is damaged or not, and the sealing gap of the sealing sheet and the rust condition in the impeller flow channel are carefully checked.
Cylinder body and spare part are adorned back
The assembly sequence is reversed from the disassembly sequence described above.
In order to accelerate disassembly and assembly speed, ensure the assembly accuracy of the unit, avoid the inclination of the cylinder cover and the internal components during disassembly and assembly, generate torsional shear stress, and in the field actual assembly process, a hoisting tool is needed to be used for hoisting the cylinder cover and the internal components in cooperation with a chain block. Taking lifting of a unit cylinder cover as an example, firstly installing a chain block at lifting lugs at two ends of a shoulder pole tool, then hooking at the lifting lugs at the center of the shoulder pole lifting tool, observing whether the cylinder cover is horizontal or not in the lifting process, and if the cylinder cover is inclined, re-leveling the cylinder cover by adjusting the chain block, wherein the lifting of other components is the same as that of the cylinder cover.
Oil circulation
After all mechanisms are reinstalled and inspected, the whole oil system of the unit needs to be washed, and the spare lubricating oil pump is subjected to single-machine test operation; secondly, the lubricating oil does not pass through a unit bearing, only the lubricating oil circulation pipeline is washed, and the high-level oil tank is cleaned manually; then, connecting the lubricating oil pipeline with the lubricating oil injection points of all bearings of the unit, and flushing all bearings of the unit and flushing a high-level oil groove; finally, the control oil system line is flushed.
Accurate centering of unit
After the unit oil circulation is finished and the acceptance is qualified, the unit pipeline is required to be reinstalled, and after the reinstallation is finished, the unit is finally centered, and the method is the same as the initial centering, and a three-table alignment method is adopted.
Single machine test run
And after the oil system is in trial operation, the unit can be in trial operation, the compressor unit is subjected to empty load trial operation, and the load trial operation is performed after the empty load trial operation is in error.
Claims (8)
1. A method of installing a centrifugal ammonia synthesis gas compressor comprising:
step one, basic adjustment;
step two, mounting and leveling the equipment base;
after finishing the surface treatment of the unit foundation, hoisting the equipment base into position by using an automobile crane, and leveling the base by adopting a suspension sizing block installation method;
step three, grouting the equipment base;
grouting the foundation bolt holes with a high-strength shrinkage-free grouting material to a height of 100mm, filling with dry sand, supporting the formwork around the foundation bolt footing plates, pouring an epoxy resin grouting material into the formwork along one side of the formwork, and removing the formwork after reaching the strength to finish primary grouting; after primary grouting, grouting for the second time by using epoxy resin grouting material;
step four, installing a steam turbine;
the turbine cylinder body and the bearing seat are arranged on a common base, and the levelness of the unit is adjusted by adjusting jackscrews of the base;
step five, installing a high/low pressure cylinder;
after the turbine is leveled, the turbine is taken as a reference machine, and a high-pressure cylinder, a low-pressure cylinder and a gearbox are sequentially hoisted;
step six, primary centering of the unit;
the alignment among all components of the centrifugal compressor unit adopts a three-table alignment method, a steam turbine is used as a reference machine during alignment, a high-pressure cylinder is aligned with the steam turbine, then the low-pressure cylinder is aligned with the steam turbine, and finally the gear box is aligned with a driving machine; firstly, performing axial alignment calibration on a vertical plane, adjusting by changing the thickness of a gasket below a supporting leg of a compressor, and after the axial alignment is finished, performing preliminary alignment on a machine by adopting an instrument with three dial indicators, wherein one dial indicator at a radial position measures the radial deviation of a shaft, and the two dial indicators at axial positions measure the axial deviation of the shaft;
step seven, disassembling the high/low pressure cylinder;
after the primary centering acceptance of the unit is finished, the high-pressure cylinder and the low-pressure cylinder of the ammonia synthesis gas compressor unit are disassembled, cleaned and data retested;
step eight, disassembling the support bearing;
firstly, detaching an instrument and a wire which are arranged on a bearing box cover or a bearing cover, then detaching a pin and a screw which are connected with two halves of a coupler shield, and detaching the upper half; then the bearing box cover is taken down, screws for fixing the bearing cover are unscrewed, the bearing cover is taken out vertically, and finally screws for connecting the two half bearings are unscrewed;
step nine, checking the clearance of the support bearing;
checking the clearance of the support bearing, firstly carefully cleaning the bearing and the journal, installing an upper half bearing and a lower half bearing, putting a lead wire at the top of the journal, then installing the upper half bearing, then installing a bearing cover, screwing the bearing cover during final assembly, then removing the bearing cover and the upper half bearing, finally taking down the lead wire, measuring at two or three flattened positions of the lead wire by using a micrometer, and reading the average value; if the average value of the measurement results is larger than the diameter clearance required by the equipment, the bearing needs to be replaced;
step ten, assembling a bearing;
the assembly sequence is opposite to the disassembly sequence of the step seven and the step eight;
step eleven, disassembling the thrust bearing;
firstly, detaching a bearing box cover or an instrument and a cable on a bearing cover, secondly, detaching the upper half of a coupler shield, then detaching a thrust bearing and a gland for supporting the bearing, lifting the bearing gland, gradually removing thrust pads in the lifting process, then removing a lower half thrust ring, rotating the lower half thrust ring to a detachable position, and finally removing an adjusting gasket of the thrust bearing;
step twelve, checking the axial displacement of the rotor;
when the thrust bearing is disassembled, firstly checking axial displacement in two directions to determine whether the axial displacement keeps the designed value of the unit, secondly fixing the dial indicator on the shell, enabling the dial indicator contact to contact the end part of the rotor, and then axially moving the rotor in two directions until the inner part of the rotor contacts the shell part; finally, comparing whether the value read on the dial indicator is equal to two added clearance values in the compressor assembly drawing;
assembling a thrust bearing;
firstly, dividing an adjusting gasket of a thrust bearing into two halves, enabling the joint surfaces of the two halves to be in a horizontal position during installation, keeping the joint surfaces of the upper half and the lower half of a thrust ring in a vertical position, and then drilling holes on certain tiles of the thrust bearing so as to install thermocouples or leveling plates for installing an electric power sensing element and detecting the axial thrust of a rotor; finally, placing the bearing cover on the bracket, and if the bearing cover cannot be immediately meshed, manually rotating the shaft to apply force in two directions, and placing the bearing cover along the rotor shaft until the bearing cover is completely fastened on the bracket;
fourteen, disassembling the rotor, the labyrinth seal and the partition plate;
firstly, disassembling two top half parts of a thrust bearing and a supporting bearing, secondly, screwing four guide rods on a lower half shell, avoiding damaging a labyrinth seal when the upper half shell is lifted, then, disassembling a fixing bolt and a locating pin on a split surface of the shell, lifting the upper half shell by using a lifting screw, then, lifting the upper half shell to be placed on four hard wood brackets, fixing the upper half of a partition plate and the labyrinth seal on the upper half shell by using bolts, lifting the partition plate and the labyrinth seal together with the upper half shell, and finally tying two steel wire ropes coated with new meat materials such as rubber or plastic on two shafts between a shaft neck and the seal, lifting a rotor from the lower half shell and keeping the rotor horizontal;
fifteen, descaling and checking the rotor and the partition plate;
sixthly, the cylinder body and parts are assembled back;
seventeenth step, oil circulation;
eighteen steps, unit fine centering;
after the unit oil circulation is finished and the acceptance is qualified, the unit pipeline is required to be reinstalled, and after the reinstallation is finished, the unit is finally centered, and a three-table alignment method is adopted in the centering method;
nineteenth, single machine test run;
and after the oil system is in trial operation, the unit can be in trial operation, the compressor unit is subjected to empty load trial operation, and the load trial operation is performed after the empty load trial operation is in error.
2. The method of installing a centrifugal ammonia synthesis gas compressor according to claim 1, wherein: in the first step, when the foundation is adjusted, firstly checking whether the size, the position and the verticality of the foundation bolt hole reach the standard; and then removing the floating slurry layer at the position 20-25mm of the surface of the foundation upper layer, and finally accurately placing a jackscrew backing plate for adjusting the height of the base.
3. A method of installing a centrifugal ammonia synthesis gas compressor according to claim 1 or 2, wherein: firstly, placing a jackscrew base plate on a foundation, pushing jackscrews onto the jackscrew base plate, slowly placing a base on the foundation, leveling by using jackscrews, and enabling the distance between the base and the foundation to reach a designed and given size; the base is carefully leveled in the longitudinal direction and the transverse direction by using jackscrews, and the adjusting bolts are uniformly adjusted to uniformly bear respective loads.
4. A method of installing a centrifugal ammonia synthesis gas compressor according to claim 3, wherein: in the fourth step, the transverse levelness of the bearing seats at the two ends is ensured to be within 0.3mm/m, the axial levelness of the base at the exhaust side or the cylinder body is ensured to be within 0.3mm/m, and all foundation bolts are fastened after the adjustment of the horizontal and the central degrees of the base is finished.
5. The method of installing a centrifugal ammonia synthesis gas compressor according to claim 1, 2 or 4, wherein: in the sixth step, the radial dial indicator of the surface corresponding to the vertical direction is firstly adjusted to 0 position by the reading of the radial deviation during alignment, the two shafts are rotated according to the rotation direction of the shafts, the reading of the dial indicator is recorded every 90 degrees, if the dial indicator contact is pressed into the proper position, the reading is determined as positive number, otherwise, the reading is determined as negative number; the axial deflection of the shaft was measured using two dial gauges 180 ° apart, and initially set back to zero. And reading the axial deviation, namely setting the dial indicator to a zero point by adopting two dial indicators which are vertically arranged.
6. The method of installing a centrifugal ammonia synthesis gas compressor according to claim 5, wherein: in the step nine, lead wires are axially placed, the length of the lead wires is longer than that of the bearing, and the lead wires are stuck by using vaseline oil.
7. The method of installing a centrifugal ammonia synthesis gas compressor according to claim 6, wherein: in the fifteenth step, aiming at dirt of a rotor and a baffle, firstly, diluent, petroleum extract and trichloroethylene are used for treatment, then, metal brushes with different sizes which can contact with internal parts such as an impeller channel, a diffuser and the like are used for removing dirt, oil is brushed for protection, and then a labyrinth sealing sheet is tapped for checking whether the labyrinth sealing sheet is damaged or not, and the sealing gap of the sealing sheet and the rust condition in the impeller channel are carefully checked.
8. The method of installing a centrifugal ammonia synthesis gas compressor according to claim 7, wherein: seventeenth, after all mechanisms are reinstalled and inspected, the whole oil system of the unit needs to be washed, and a stand-alone test operation is performed on the spare lubricating oil pump; secondly, the lubricating oil does not pass through a unit bearing, only the lubricating oil circulation pipeline is washed, and the high-level oil tank is cleaned manually; then, connecting the lubricating oil pipeline with the lubricating oil injection points of all bearings of the unit, and flushing all bearings of the unit and flushing a high-level oil groove; finally, the control oil system line is flushed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310594793.3A CN116480633A (en) | 2023-05-25 | 2023-05-25 | Installation method of centrifugal ammonia synthesis gas compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310594793.3A CN116480633A (en) | 2023-05-25 | 2023-05-25 | Installation method of centrifugal ammonia synthesis gas compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116480633A true CN116480633A (en) | 2023-07-25 |
Family
ID=87217969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310594793.3A Pending CN116480633A (en) | 2023-05-25 | 2023-05-25 | Installation method of centrifugal ammonia synthesis gas compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116480633A (en) |
-
2023
- 2023-05-25 CN CN202310594793.3A patent/CN116480633A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103939156B (en) | Method for installing nuclear power half-speed steam turbine | |
| CN108362501B (en) | Rack mounting method for performance test of aviation axial flow compressor | |
| CN112128040B (en) | Inspection method for upper and lower leak-stopping rings of vertical shaft mixed-flow water turbine | |
| CN114320501B (en) | Disassembly and installation process for steam turbine of chemical power station | |
| CN113856837A (en) | Installation construction method of ball mill | |
| CN113084476B (en) | Steam turbine unit installation process | |
| CN105277459B (en) | Multi-functional fatigue wear testing machine | |
| CN111219252B (en) | Heavy gas turbine installation construction method | |
| CN102749195B (en) | High-speed water bearing performance test device with air seal | |
| CN116480633A (en) | Installation method of centrifugal ammonia synthesis gas compressor | |
| US3764098A (en) | Turbine with load force determining device | |
| CN116436219A (en) | Method for installing generator of nuclear power unit | |
| CN117309341A (en) | Cylinder liner fatigue testing device and cylinder liner testing method | |
| CN205157357U (en) | Multi -functional fatigue wear testing machine | |
| WO2020073578A1 (en) | Device for testing bearing performance of vertical shaft lifting spindle device | |
| RU2531126C2 (en) | Method to test composite-coupling repair structure for pipes of manifold pipelines | |
| CN211618026U (en) | Test equipment structure for ship shafting end face sealing device | |
| CN112360582B (en) | High-medium-pressure non-dummy shaft final assembly method for remanufacturing unit | |
| CN108204794A (en) | A kind of main shaft seal repair method | |
| CN113588263A (en) | Fatigue test system and method for hub bearing unit structure | |
| CN204330476U (en) | Fatigue tester friction pair | |
| CN111669021A (en) | Installation method of large single-bearing brushless excitation synchronous motor | |
| CN115007275A (en) | Mounting construction method of bowl type medium speed coal mill | |
| CN214502417U (en) | Center measuring, positioning and adjusting device of hydraulic generator | |
| Standard | Axial and centrifugal compressors and expander-compressors for petroleum, chemical and gas industry services |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |